Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1976-02-27
1977-06-28
Tupman, W.
Metal working
Method of mechanical manufacture
Assembling or joining
29577, 29588, 204195G, B01J 1700
Patent
active
040316068
ABSTRACT:
A solid state pH measuring electrode having the pH measuring electrode structure formed by successive layers on an insulating substrate with an outer pH sensitive glass layer being deposited on a supporting solid electrolyte layer by RF sputtering. The reference electrode is similarly formed by depositing an outer layer of glass onto a supporting solid electrolyte layer by RF sputtering with the temperature expansion of the glass and supporting solid electrolyte structure being selected to produce a differential expansion causing random cracking of the glass layer during temperature cycling of the reference electrode. A combination structure is provided wherein the pH measuring electrode and the reference electrode are formed on opposite sides of the same electrically insulating substrate with a thermal compensating element being included in the integrated package.
REFERENCES:
patent: 2182376 (1939-12-01), Gray
patent: 2604517 (1952-07-01), Brennan
patent: 2917683 (1959-12-01), Brennan
patent: 3282817 (1966-11-01), Riseman
patent: 3498901 (1970-03-01), Metz
patent: 3853731 (1974-12-01), Gray
Burton Lockwood D.
Halista Mitchell J.
Honeywell Inc.
Marhoefer Laurence J.
Tupman W.
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